Choline is the most common dietary source of methyl groups, but methionine (an amino acid) and carnitine (made from amino acid) are also important sources of methyl (-CH3) groups. Carnitine is found in animal source products like meat (the redder the higher the content) but also found in fish, poultry and milk.
Jonathan’s background as a practicing diabetes specialist for 15 years and 17-year career developing nutritional prescriptive products for the pharmaceutical industry has contributed to his ability to understand nutrients, how they work and why they are important.
Over the years he has acquired broad and in-depth knowledge in minerals, essential fatty acids and other nutrients, but has special expertise in Vitamin B12 and choline metabolism. He is often asked to speak at national and international venues to articulate why B12, folate and choline are so important to gene function, brain development, liver and cardiovascular health. He applies pharmaceutical standards to nutrient science and has developed a unique ability to translate complicated concepts into simple promotional messages that resonate with practitioners and consumers. He has developed dozens of innovative nutritional products, of which many are category leaders in the US. Jonathan obtained his medical degree from the University of the Witwatersrand Medical School in South Africa and did his fellowship in Endocrinology at Washington University in St. Louis, MO.
The MMA Test Teaches a Lot About Why B12 is So Important for Energy
First Study to Find a Link
B12 Absorption Pathway and Players Offer Unique Opportunities for Drug Delivery
Anything Above 55mcg B12 is Considered Excess
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